Carbureter.



J. S. GOLDBERG GARBURETER.

. APPLICATION FILED MAR.19, 1914. 1,1 28,77 3. Patented Feb. 16, 1915.

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GARBUBBTEB. 'APPLIOATION FILED MAB..19, 1914.

1,128,??3. Patented Feb. 16, 1915.

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UNITED STATES PATENT OFFICE.

JOHN S. GOLDBERG, OF CHICAGO, ILLINOIS, ASSIGNOR T0 STROMBERG MOTOR DEVICES COMPANY, OF CHICAGO, ILLINOIS.

CARBURETER.-

Patented Feb. 1.6, 1915.

Original application filed December 17, 1910, Serial No. 597,757. Divided and this application filed March 19, 1914. Serial No. 825,756.

To all whom it may concern:

Be it known that I, JOHN S. GOLDBERG, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Carbureters, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to carbureters, such as are employed in association with automobile engines, and contemplates means for properly controlling the richness of the combustible mixture produced thereby.

The present invention has to do primarily with that type of carbureter in which a fuel inlet is associated with an open ,main air inlet and in which an auxiliary air inlet is provided, this auxiliary inlet being normally closed but being so controlled that it automatically is opened when a sufficient degree of suction has been produced in the carbureting chamber.

It is well-known that, unless some means is provided to compensate therefor, it is the tendency for a mixture formed by a single fuel inlet in an air passage to become too rich as the suction increases, and the auxiliary air valve which responds on. the greater suctions is provided, according to my inventiomin order to properly compensate for this undesirable increase in richness In order, however, that the pro-per mixture may always be maintained and in order also that the nicety of adjustment may be enlarged, I associate with the auxiliary air inlet an auxiliary fuel inlet which is arranged to be subject to the aspirating effect of the air entering this auxiliary air inlet. Thus, I have a main fuel nozzle, subject practically exclusively to the aspirating effect of the air entering through the main air inlet, and a secondary nozzle, subject practically exclusively to theaspirating effect of the air entering the auxiliary air inlet, which is controlled by a valve subject to the pressure below the throttle. By this means, I am enabled to secure a very fine control of the mixture richness, since the diluting effect of the auxiliary air valve is properly graded by the effect of the air entering by that valve on the fuel inlet especially provided for it.

Since both fuel nozzles and both air inlets are subject to the pressure on the same side of the throttle, the adjustments that I provide may be relatively set so as to secure the proper richness of the mixture at all suctions and, with this end in view, I have provided the various parts which will be referred to later. a

In Patent No. 1,099,293, issued June 9, 191 1 to Harry G. Tillotson and myself as joint inventors, there is set forth and claimed an arrangement wherein a secondary fuel inlet is provided and wherein this secondary fuel inlet is permanently open to the carbureting chamber below the throttle. In that application, the height of the nozzle is relied upon to effect the necessary delay in the response of the secondary fuel nozzle, while in the present application, the secondary fuel nozzle is controlled by a valve which cooperates with the valve for the'auxiliary air inlet so that the fuel nozzle is opened at the inception of the opening movement of the air valve or at a definite point after the air valve has opened.

The present application is divisional from the application which resulted in my Patent No. 1,119,078, dated Dec. 1, 1914 wherein the claims relate to the construction of the fuel nozzle.

My invention is embodied in the structure illustrated in the accompanying drawings, in which Figure 1 is a vertical longitudinal sectional view of my carburetor; and Fig. 2 is a plan view thereof. Fig. 3 is a detail view which will be referred to.

Extending from the top of the body part of the casing 1, at the side opposite the shelf 2, is the casing 3, which forms an auxiliary air inlet chamber 4 and serves to support the various parts of the secondary automatic valve mechanism which will be described. The main body part of the casing comprises the annular base 5 from which the outer cylindrical shell 6 extends upwardly, this shell being supplemented upon the inside by an inner shell 7, as clearly shown in the drawings. The space between the shells (3 and 7 forms a heating jacket through which hot water may be circulated.

Across the base 5 is the bridge section 14 which supports a sleeve 15 extending down wardly therefrom in axial relation with the base 5 andv the shell 7. The bridge 14. also supports the upwardly extending sleeve 16, which is disposed in axial alinement with the sleeve 15. The sleeve 16-is -providedwith an axial threaded opening in which is threaded a nozzle piece 17, this nozzle piece having the nozzle opening 18 and the central bore 19 which thus communicates with the inside Of; the, sleeve and thereby connects with the horizontal passageway 20 which;

leads to the shelf 2, as wilLhereinafterbe described. The lower end of the sleeve 15' is internally screw-threaded for therecep;

tion of a plug'2l, this plug having a central bore for the reception of the stem 22 ofa needle valve 23. This stem 22, at its lower end, passes into a pocket 24. in the plug, Which pocket is provided with screw threads for the reception of the screwthreaded adjusting piece 25, which is in rigid relation with the stem 22. As will be apparent from the drawings, this adjusting piece '25 is adapted for manual manipulation, and it is clear that turning the adjust-- 'ing-pice one way or the other will result in the upwardor downward -,movement of the stem 22-and, consequently, ofthe valve part Y 23. This valve pa-rt 23 is inthe form of a need ie valve and is provided-*- with the axial passage 26 and the cross passages27, 27, connecting therewith. When the adjusting piece 25 is turned'so as to lower the needle 1 valve, the head of the valve 23 Will be separated from the nozzle piece 17 so as to leave an annular passageway, the nozzle.

piece, in this instance, having a tapered seat for the reception of the tapered valve head. The resulting annular passageway acts in parallel with the passageway 26, and it will appear that if suction is applied at the nozzle opening 18, fuel may be drawn through the passageway 20, up through. the sleeve, through the passageway 26 alone or in conjunction 7 with the annular j passageway, through the bore 19 and through the nozzle opening 18. Since these are fuel passage.- ways, the plug 21 is stuffed, as indicated at 28, the stuffing box being completed by meansof the collar 29, WlllCh has threaded engagement with the pocket in the plug.

The arrangement above described, this doumaximum limit and the latter being the desired minimum limit. It will appear that when the valve head 23 is screwed up tight into the nozzle piece 17, the passageway 26 will determine the flow of the fuel. And since this passageway determines the flow alone, it will appear that when the parts are in this position the minimum How of fuel will take place. When it is desired to increasethe amount of fuel passing from the nozzle,"theadjus"ting piece 25 is turned in the proper direction so as to separatev the valve head 23 fromthe seat in the nozzle piece 17 so as to supplement-the passagebe the maximum flow, Thus, even though the adjusting piece 25be "screwed down to its limit, no less than the desired minimum flow of fuel takes place. Similarly, if the adjusting piece 25 is'turned in the opposite direction to such an extent as tomove the head 23 a considerable distance from the nozzle piece 17, no more than the maximum flow of fuel will take place, and the entire arrangement is, therefore, guarded against improper manipulation by an inexperiencedperson.

Thelower-section of the shell7 is of the same inner diameter as that of the annular base portion 5, while the intermediate zone 30 of the shell 7 converges conically upward so that the imaginary apex of'the-upper surface of said zone will coincide with the upper end ofthe nozzle piece 17; The upper section or zone 31 of the shell 7 diloo verges toward and meets the upper end of conically convergent and the upper zone divergent,- the nozzle end lying in theapex of the intermediary conical zone. The lower end of the passageway, as will be described later, during the running of the engine, is open to the atmosphere, and air cantherefore enter and fiow upwa-rdly through the passageway, this air being deflectedlby' the conical walls of the intermediary zone and its energy directed across the outlet of the nozzle to extract oil therefrom gandthe diverging zone will cause the air and oil to become thoroughlymix'ed to form .asuitable mixture with whichthe engine is to be supplied.

A socket member 32'is slipped over the downwardlyextending sleeve 15 and is held in placeagainst the bottom of the sleeve 15 by means of the nut portion 33 of the plug 21, as clearly illustrated in Fig. 1.. The

magma socket member 32 is provided with a prong 34 which engages a lug 35 extending from the base portion 5 of the carbureter casing proper. This engagement prevents the cup and the parts carried thereby, as will be described, from turning when allthe parts are properly set in place. The major portion of the socket member 32 is in the form of a sleeve surrounding the sleeve 15 and upon this outer sleeve a collar 36, is loosely mounted. This collar is of such diameter that it may close the main inlet passageway of thecarbureter, but it is normally held in its open position, against a suitable shoulder 37 on the socket member 32, bymeans of a helical spring 38 resting in an annular groove 39 in the collar and engaging the under side of the bridge 14:, all as indicated in Figs. 1 and 2. The socket member 32 is suitably enlarged, as shown, to provide a bearing for a pin 10 which extends at right angles to the axisof the sleeves. Upon this pin one or more cams 41, 41 are secured, these cams engaging the under side'of the collar 29, as indicated in the drawings so as to raise the collar to restrict the main air inlet temporarily. This arrangement is clearly illustrated in Fig. 3.

The shelf 2 supports the cylindrical glass shell 43, covered by a cap 44, the base, the shell and thecap forming an oil receptacle. The shelf 2, which, except for its connection with the main body of the carbureter, is circular, has a central opening which is surrounded by a flange 45 and a fuel inlet frame 46 is held tightly against this flange by means of a coupling 47. The shelf 2 supports a valve disk 48, the central portion of which is in theform of a boss extending down through the central 0 enings, this arrangement being held tightly in place by. means of a nut 49. The valve disk 48 has the central passageway 50 which thus connects with the source of fuel, this central passageway, as shown in the drawings, being countersunk to form a suitable beveled valve seat. Extending upwardly from the valve disk 45, concentric with the passageway 50 is a sleeve 51, which is screwthreaded at the top so that it may engage by that means in a central opening in the cover 1 1 and so hold the cover in place. A stem 52 is disposed in this sleeve, this stem being provided at the bottom thereof with a pocket in which a valve spindle 53 is hung upon a pin 54. The valve oint 55 is adapted to engage the seat in t e valve disk 48 so as to control the passageway 50. The lower end of the sleeve 51 has the diametrically opposite slots 56 and 57 across which pins 58, 58 are disposed. Upon these pins the foot-shaped levers 59, 59 are niounted, the toes 60, 60 of these levers being arranged to engage the lower end of the stem 52, as clearly illustrated in Fig. 1. An annular float 61 encircles the sleeve 51 and is loosely disposed relatively thereto so that it may rise and fall with the level of the oil in the float chamber, as will be pointedv out.

The main portions of the levers 59, 59 engage the under side of this float and it is clear that the weight of this fioat will cause the main portions of these levers to move downwardly while the toes thereof will move upwardly and raise the stem 52 against the tension of the helical spring 61, which is disposed inside the sleeve 51 around the stem 52 between a shoulder 62 on the stem and the inside of a'cap 63 which 7 screws down over the outside of the sleeve. It will be apparent that,- since the oil enters through the passageway 50, the float 61 will be gradually raised and, because of such operation, the spring 61 will force the valve head 55 down to close the passageway 50 to a greater or less extent. As the oil in the float chamber, the passageway 20, and associated passageways, becomes depleted, the float 61 will gradually lower and allow more oil to enter through the passageway 50 and thus a constant supply of oil is maintained. It is apparent that the tension of the spring 61 may be adjusted by screwing the cap 63 down upon the stem 51 to a greater or less extent, and in order to lock the cap 63 in any adjusted position, I provide a series of vertical grooves 64, 64 therein. Associating with these grooves is a plunger- 65 which rides in a pocket in a screw 66 suitably mounted in a boss 67 on the cover 44:, the

helical spring 68 being provided to maintain the plunger 65 in engagement with one of the grooves 64. The plunger 65 has a rounded head'so that the cap 63 may be turned without any particular unlocking, but it is clear that the plunger will hold the cap in position against being jarred out of place or against any accidental movement. The stem 52 passes out beyond the cap 63 through a bolt 69 therein, and the stem has secured in its upper end a second ary ca 70 which extends over the end of the primary cap 63 so as to secure'a dustproof arrangement. If particles carried in the oil should become clogged in the valve seat at the passageway 50 and should thus interfere with the operation of the valve and the parts associated therewith, the cap 70 may be grasped manually and raised against the tension of the helical spring 61 the frame 71 operable by also secured extends diametrically through and carries a disk valve 75 means of a suitable lever 70 upon the shaft. The chaml'ier 72 also communicites with the auxiliary valve chamher at by means of a passageway 77. On the top of the casing 3 is supported the valve frame '78, which is constructed in the form of a spider and has the passagr-iways T9, 79, through which the valve chamber may communicate directly with the atmosphere. The lower edge of the valve frame is beveled to form an annular valve seat 81, with which a disk valve 82 cooperates. The valve disk hub 83 is secured to avalve stem 84, which passes axially through the hub 85 supported from the valve frame 78 by means of the radial members 86. The bottom of the casing 3 has an opening in axial alinement with. the stem 84, which opening is surrounded by a sleeve 87 which extends a considerable distance downwardly. This sleeve is internally screw-threaded for the reception of the plug 88 which has an axial opening in which a thimble 89 is disposed, this thimble being provided with an annular shoulder 90, which rests upon the top of the plug, as clearly illustrated in Fig. 1. The axial pocket in the thimble 89 receives the lower end of the stem 8%. The plug 86 is surrounded by the sleeve 91 which is held againstthe annular shoulder 92 on the plug by means of a pin 93, this cup extending upwardly, as shown in Fig. 1. to inclose the lower end of the sleeve 87. A helical spring 95 surrounds the stem 84 and is disposed between the under side of the valve member 82 and the shoulder 96 on the th mble 89.

It will appear that when the thimble 89 rests upon the top of the plug 88, the tension of the spring 95 can be adjusted by turning the sleeve 91 in one direction or the other. It is clear that turning the sleeve will result in corresponding movement of the plug 88, and it is clear that such movement of the plug will move it upwardly or downwardly to change the tension of the spring 95 and its elfect upon the valve piece 82. The valve is guided in its movement by means of a pin 97 which passes through an opening 98 in one .of the cross-pieces 86. The sleeve 91 and the associated parts are the elements that are provided for permanent adjustment of the spring 95 so that the valve 82 may respond to thesuction of the engine at the proper time. In order to hold the sleeve 91 in any adjusted position,

this sleeve is provided with a plurality of.

grooves 99in the periphery thereof, these grooves beingparallel to the axis and being adapted for the reception of a plunger 100 which operates in a' pocket in a screw 101 which is mounted in a lug 102 extending from the casing 3. A spiral spring 103 is disposed in the pocket, as clearly illustrated in Fig. l. to hold the plunger 100 in engagement with any one of the grooves 99. The head of the plunger 100 is rounded so that unlocking is unnecessary and it is merely required to turn the sleeve 91 against this drag until the succeeding groove is reached.

This sullieient tohold the sleeve against movement by reason of jars or accidental as has just been pointed out. the spring is adjusted so that the response of the valve 82 may take place at the proper time. In' order that the tension of the valve 95 may be varied while the machine is running and when it is not practical to operate the per manent adjusting means which has just been described, I provide means for temporarily raising the thimble 89 upon which the lower end of the pring rests. This arrangement is in the way of a bellcrank lever 101': which is pivoted at 105 in a' lug 106 extending from a yoke 10? pivotally mounted upon the sleeve 8?. The rounded lower end of the thimble S9 is engagedby the arm 108 of the bell crank lever 10% and the other arm 109 connected at 110 with suitable connecting mechanism which leads to operating means within the reach and control of the operator. It is seen referring to Fig. 1, that when the bell-crank lever 10$ is turned in a clockwise direction, the other arm 10S thereof will move'vpwardly to transmit the corresponding movement to the thimble 89. This will compress the spring 95 and will increase the tension thereon and it is evident that while the bell-crank lever 10-t is thrown over in this position. the response of the valve 82 to the adjusted position by means of balls 115,

held in (.liametrically opposite vertical groove 116 by leans of springs. 11? disposed in pockets with the balls. T heslotted end 112- of the leverllQ embraces thestem S-L'as shown in Fig. 1. The slotted end 118 of the lever 11; engages the head 119 of the spindle 120. the lower part of which. is threaded and thus carries the needle valve 121. The spindle 1'30 may be adjusted as desired within the valve. piece 121 and is held in its adjusted position by means of a set screw 122. A helicals n-iug 123 encircles the spindle and is disposed he terior. A plug 128 provided with a passageway 129 therethrough is inserted in the passage 20 so that it does not close or con.- tract the passage 126. The end of the passage 20 is closed by means of the screw plug 129. The arrangement just described is particularly desirable for cleaning pur poses.

As before pointed out, the effective area of the primary nozzle is permanently adjusted by means of the adjusting member 25 and the tension of the spring 95 is also adjusted by means of the cup 91. These parts having been properly set to meet the existing conditions, the carbureter is ready for operation. The spring 61' which is associated with the float chamber is also properly adjusted. In starting, the lever 42 is moved so as to nearly close the central main air passageway through the carbureter, and it is clear that such operation will cause most i of the suction to concentrate upon the nozzle opening 18. Depending upon the extent to which the main passageway is closed, the valve82 may .or'may not respond. .It is a matter of control and it is possible that the conditions may be met with in various ways. It is clear that choking the main air passageway in this way and thus concentrating the suction upon the fuel inlet, the mixture will become a rich one such as is re- 'quired in starting. In the running of the engine, if it is desired to change the richness of the mixture, the bell-crank lever 104 may be actuated by the operator from his position and the tension of the spring 95 may in that way be adjusted, as has heretofore been described, to change the pressure upon the under side of the valve 82 and to thus change the degree of suction to which the valve is responsive. It is clear that by means of the lever 112 the opening of the valve 82 is accompanied by a corresponding opening of the-supplemental fuel passage 126 and in this way the additional fuel for combustion is supplied. The primary-objects of my invention are consistent with my aim to secure operation which is simple and construction which is inexpensive and practical.

What I claim is:

1. In a carbureter, the combination of a reservoir for supplying liquid filel, a mixing chamber, a main permanently open fuel inlet, a main air inlet, an auxiliary air valve, an auxiliary fuel inlet disposed in the path of air entering past said valve, means for normally closing said auxiliary fuel inlet, and means for opening said fuel inlet by the action of said auxiliary air valve.

'2. In a carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, amain fuel inlet, a main air inlet, an auxiliary air valve, an auxiliary fuel inlet, means for normally closing said auxiliary fuel inlet, and means for opening said fuel inlet by the action of said auxiliary air valve when said auxiliary air valve has been opened a predetermined amount.

3. In a carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, a main permanently open fuel inlet, a main air inlet, an auxiliary air valve, said valve adapted to be unseated by the suction within said carbureter, an auxiliary fuel inlet disposed in the path of air entering past said valve, means for normally closing said auxiliary fuel inlet, and means for automatically opening said fuel inlet when said auxiliary air valve is unseated v i 4:. In a carbureter, the combination of a reservoir for supplying liquid fuel, a mix ing chamber, a main permanently open fuel inlet, a main air inlet, an auxiliary air valve, said valve adapted to be unseated by the suction within said carbureter, an auxiliary fuel inlet disposed in the path of air entering past said valve, a valve for closing said fuel inlet, and means for automatically opening said fuel inlet when said air valve is unseated.

5. In a carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, a main fuel inlet, a main air inlet, an auxiliary air valve, said valve adapted to be unseated by the suction within said carbureter, an auxiliary fuel inlet, a valve for normally closing said auxiliary fuel inlet, and means for automatically opening said valve when said air valve is unseated and moved a predetermined amount.

6. In a carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, a main fuel inlet, a main air inlet, an auxiliary air valve, said valve adapted to be unseated by the su'rtion within said carbureter, an auxiliary fuel inlet, a valve for closing said fuel inlet, means for automatically opening said fuel inlet when said air valve is unseated, and meansfor regulating the distance which said auxiliary air valve is required to move before said auxiliary fuel inlet is opened.

7. In a carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, a main permanently open fuel inlet, a main air inlet, a normally seated auxiliary air valve, said valve adapt,- ed to be unseated by the suction within said carbureter, means for regulating the pressure tending to seat said auxiliary air valve, an auxiliary fuel inlet disposed in the path of air entering past said valve, means for normally closing said auxiliary fuel inlet, and means for opening said fuel inlet by the action of said auxiliary air valve.

8. In a carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, a main fuel inlet, a main air inlet, an auxiliary air valve, an auxiliary fuel inlet, passages for supplying liquid fuel to the main and auxiliary fuel inlets, a restricted opening in the passage supplying fuel to the auxiliary fuel inlet, and means for varying to any degree the flow of fuel through said auxiliary fuel inlet by the movement of the auxiliary air valve.

9. In a carburetenthe combination of a reservoir for supplying liquid fuel, a mixing chamber, a main fuel inlet, a main air inlet, an auxiliary air valve, an auxiliary fuel inlet, passages for supplying liquid fuel to the main and auxiliary fuel inlets, a removable plug in the passage supplying fuel to the auxiliarv fuel inlet, said nozzle having a restricted opening therethrough, and means for varying to any degree the flow of fuel through said auxiliary fuel inlet by the movement of the auxiliary air valve.

10. In a carbureter, the combination of a reservoir for supplying liquid fuel, armixing chamber, a main fuel inlet, a main air inlet, an auxiliary air valve, spring means for normally keeping said valve seated, means for regulating the tension of said spring means, an auxiliary fuel inlet, means for normally closing said auxiliary fuel inlet, and means for automatically opening said fuel inlet by less than the whole movement of the auxiliary air valve.

11. in a carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, a mainfuel inlet, a main air inlet, an auxiliary air valve, an auxiliary fuel inlet disposed in the path of air entering past said valve, a tapered stem normally closing the auxiliary fuel inlet, a spring normally holding said stem seated in said inlet. and means for moving said stem from said inlet when the auxiliary air valve is unseated.

1:2. in a'carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, a main fuel inlet, a main air inlet, an auxiliary air valve, an auxiliary fuel inlet, a tapered stem normally closing the auxiliary fuel inlet, a spring normally holding said stem seated in said inlet, and a lever, one end of which engages said stem. and the other end of which engages said auxiliary air valve, said lever thereby adapted to unseat said stem when the auxiliary air valve is unseated.

13. In a carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, a main fuel inlet, a main air inlet, an auxiliary air valve, an auxiliary fuel inlet, a tapered stem normally closing the auxiliary fuel inlet, a spring normally holding said stem seated in said inlet, ahead on said stem, a second stem for the auxiliary air valve, a head on said second stem, and a lever, one end of which engages the head of the first stem and the other end of which engages the head of the second stem, said lever thereby adapted to unseat the stem from the fuel inlet when the auxiliary air valve is unseated.

let. In a carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, a main fuel inlet, a main air inlet, an auxiliary air valve, an auxiliary fuel inlet, a tapered stem normally closing the auxiliary fuel inlet, a spring normally holding said stem seated in said inlet, an adjustable head on said stem, a second stem for the auxiliary air valve, a head on said second stem, and a lever, one end of which engages the head of the first stem, and the other end of which engages the head of the second stem, said lever thereby adapted to unseat the stem from the fuel inlet when the auxiliary air valve is unseated.

15. In a carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, a main fuel, inlet, a main air inlet, an auxiliary air valve, an auxiliary fuel inlet, a tapered stem normally closing the auxiliary fuel inlet, a spring normally holding said stem seated in said inlet, a head on said stem, a second stem for said auxiliary air 'alve, an adjustable head on said second stem, means for locking said hea'd in its adjusted position, and a lever, one end of which engages the head of said first stem, and the other end of which engages the head of the said second stein, said lever thereby adapted to unseat the first stem from said fuel inlet when the auxiliary air valve is unseated. I

16. Ina carbureter, the combination of a reservoir for supplying liquid fuel, a mixing chamber, a main fuel inlet, a main air inlet, an auxiliary air valve, an auxiliary fuel inlet, a tapered stem normally, closing the auxiliary fuel inlet, a spring normally holding said stem seated in said inlet, an adjustable head on said stem, :1 second stem .for said auxiliary air valve, an adjustable head on said second stem, means for locking said second head in position, and a lever, one end of which engages the head of said first stem,

and the other end of which engages the head of said second stem, said lever thereby adapted to unseat the first stem from said fuel inlet when the auxiliary air valve is unseated.

17. In a carbureter, a casing having an outlet, a throttle in said outlet, a carbureting chamber on one side of said throttle, a main air inlet for said chamber, anauxiliary air inlet for said chamber, a suction operated valve for said auxiliary air inlet,a main fuel nozzle disposed in said main air inlet, an auxiliary fuel nozzle disposed in the path of air entering said auxiliary air inlet, and means for controlling the outlet of said auxiliary fuel nozzle, said controlling means operating automatically inresponse to said suction during the movement of said valve.

18. In a carbureter, a casing having an outlet, a throttle in said outlet, a carbureting chamber on one side of said throttle, a main air inlet for said chamber, an auxiliary air inlet for said chamber, a suction operated valve for said auxiliary air inlet, a main fuel nozzle disposed in said main air inlet, an auxiliary fuel nozzle disposed in the path of air entering said auxiliary air inlet, and meansfor controlling the outlet of said auxiliary fuel nozzle, said controlling means operating automatically in response to said suction during the movement of said valve.

19. In a carbureter, a carbureting chainber, a main air inlet therefor, an auxiliary air inlet therefor, a valve for said auxiliary air inlet, a main fuel nozzle disposed in said main air inlet, an auxiliary fuel nozzle disposed in the path of air enteringsaid auxiliary air inlet, and means for controlling the outlet of said auxiliary fuel nozzle, said controlling means being operated by the movement of said valve.

20. In a carbureter, a carbureting chamber, a main air inlet therefor,-an auxiliary air inlet therefor, a valve for said auxiliary air inlet, a main fuel nozzle disposed in said main air inlet, an auxiliary fuel nozzle disposed in the path of air entering said auxiliary air inlet, and means for controlling the outlet of said auxiliary fuel nozzle, said controlling means being operated by the movement of said valve to open said fuel nozzle by the opening of said valve,

21. In a carbureter,, a carbureting chamber, a main air inlet therefor, an auxiliary air inlet therefor, a suction operated valve for said auxiliary air inlet, a main fuel nozzle disposed in said main air inlet, an auxiliary fuel nozzle having its outlet at a considerably higher level than that of the main fuel nozzle, and a valve controlling-the outlet from said auxiliary fuel nozzle, the fuel valve being arranged to operate during the movement of the air valve.

22. In a carbureter,-a 'carbureting chamber, a main air inlet therefor, an auxiliary air inlet therefor, a suction operated valve for said auxiliary air inlet, a main fuel nozzle disposed in said main air inlet, an auxiliary fuel nozzle disposed in the path of air entering said auxiliary air inlet, and means for controlling the outlet of said auxiliary fuel nozzle, said controlling means being operated by the movement of said valve.

23.. In a carbureter, a carbureting chamber, a main air inlet therefor, an auxiliary,

air inlet therefor, a'suction operated valve in said auxiliary air inlet, a normally open valve in said main air inlet, a main fuel nozzle disposed in said main air inlet, independent means for operating said main air inlet valve to temporarily restrict the main air inlet, and manually operated lever mechanism for temporarily increasing the seating tension on said suction operated valve.

25. In combination, a double carbureter, each element comprising an air inlet and a fuel inlet, each fuel inlet being disposed in the pathway of the air entering its respective air inlet so as to be directly subject to the aspirating effect of the air entering its respective air inlet but not so subject to the air entering through the other air inlet, the air inlet of one carbureting element being normally open, a suction controlled valve controlling the airinlet of the other carbureting element, a valve controlling the fuel inletof said other carbureting element, and means for mechanically connecting said valves. v

' 26. In combination, a double carbureter, each element comprising an air inletand a fuel inlet, each fuel inlet being disposedin the pathway of the air entering its respective air inlet so as to be directly subject to the aspirating effect of the air entering its respective air inlet but not so subject to the air entering through the other air inlet, the air inlet 0 one carbureting element being normally open, a suction controlled valve controlling the air inlet of the other carbureting element. a valve controlling the fuel inlet of said other carbureting element, and means for mechanically connecting said valves, the fuel inlet of one of said carbureting elements being disposed atahigher plane relative to a maintained fuel level than the fuel nozzle of the other carbureting element.

27. In a carbureter, a casing having an outlet, a throttle in said outlet, a constant level supply chamber for supply ng liquid fuel, a carbureting chamber on one side of said throttle, a main air inlet for said chamber, an auxiliary air inlet for said chamher, a suction operated valve for said auxiliary air inlet, a main fuel nozzle disposed in said main air inlet, an auxiliary fuel nozzle having its outlet at a considerably higher level than that of the main fuel nozzle and disposed in the path of air entering said auxiliary air inlet, and a valve controlling the outlet from said auxiliary fuel nozzle,

Copies 01 this patent may be obtained for the fuel valve being arranged to operate during the movement of the air valve, each fuel nozzle being subject to the aspirating effect of the air entering its respective air inlet, but not so subject to the aspirating eifect of the air entering the other air inlet.

In witness whereof, I hereunto subscribe my name this 28th day of February, A. D.

JOHN S. GOLDBERG. Witnesses:

AUGUST H. L. ARNDT, CAMERON A. VVHrrsnTT.

five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

